Valve.



Patented May 7,1918.

J. M. PALMER.

VALVE.

APPLICATION min 001.15. 1915.

` its formation,

- description,

i, I rran r'ras marna imion.

3' OHN '1311. PALMER, OF CHICAGO, ILLINOIS.

VALVE.

iaeeaaes.

` specification of Letters Patent.

Pateiiteol May 13m8.

Application filed October 15, 1915. Serial No. 56,014.

To all 1whom t may concern:

Be it known that I, JOHN M. PALMER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful mprovement in Valves, lof which the following is a full, clear, concise, and exact reference 'being liad to the accompanying drawings, forming a part of this specification.

My invention relates ticularly to that class to valves, and parof valves whicli are employed for controlling the flow of fiuid under pressure.

In devices of tliis kind a-comnion difliculty has been due to the fact Ithat the valve niembei' and valve seat, particularly the latter,

are 'cut' or worn away by the passing fuel and to overcome this, as far as possible, hardened steel and other special materials are employed'. These special materials are expensive 'and are, nevertheless, subject to considerable wearing .by the action refei'red to.

It is the object of my invention to provide a more durable valve and to this end I have made extensive experiments and tests. I have finally, however, departed from the teachingsof the art and now employ a valve seat and valve face of chilled iron. I am aware that cliilled iron, in and of itself is old, but so far as I know I 'am the first to einploy chilled iron seats and faces in the valves of which that illustrated in the accoinpanying drawing is an example. n this drawing, the body is shown at 1 and tlie inlet and outlet at 2 and 3, respectively. The inner end 'of the Outlet passageway is surrounded by a removable ring seat sci'ewed into place, 'as shown. This seat, in is of metal preferably iron, cast against a chill at the surface 5.

Co"perating with this seat is a valve niembei' which, in its formation, is of metal, pi'eferably iroii, cast against a chill at the surface 7. The member 6 is-carried at the lower end of a stem 8, threaded in a cover 9, and provided With a hand wheel 10, the usual stuffing boxll being provided.

find by experiment that a valve member `and valve seat of theY nature described is peculiarly and specially adapted for the use described. It withstands the wear beyondthe hardest valve 'members and seats of the art and the material is considerably less expensive. Furthermore, the mechanical operations required in construction are eflectivel)v reduced. "Since it is only the faces, which otherwise would be detrimentally affected by the passing fiuid such as steain, wliich are made liighly i'es-istant in this way, the remainder of the structures are properly soft for machining and finishing as required in structures' of this sort.

I claim:

1. In combination, a valve chambei` having an inlet and an outlet and a port connecting them, a valve seat surrounding said port, said valve seat having its engaging surface of chilled metal but being otherwise soft aiid a valve member having a face for face to face engagement with said seat.

:2. In' combination a valve ehamber having an inlet and an outlet and a port connecting them, a valve seat sui'i'ounding said port, said valve seat having its engaging surface of chilled metal but being otherwise soft JOHN M. PALMER. 

